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Delete Cookies on Exit1.0.1.1-signed.1-signed

Deletes all cookies when Firefox Mobile is closed, preventing sites and web trackers from persisting data across browsing sessions and improving user privacy. This add-on is NOT for Firefox Desktop, which have this feature built-in.

About this Add-on

This add-on deletes all cookies when Firefox Mobile is closed, but stills allows them to be used in the current browsing session (so it do not prevent site logins and other benign uses of cookies). This improves user privacy by preventing websites and, more importantly, ad-providers and web trackers from persisting any information (specially personally identifiable information) between two browsing sessions.

This add-on is not intended to run in Firefox for Desktop! Cookie purging is a built-in feature in that version, so no extension is needed.

Usage

The add-on have no user interface and will not clutter your device's screen with any widget. To enable or disable the automatic deletion of cookies, just go to Menu → More → Add-ons → Delete Cookies on Exit →Enable/Disable.

Developer’s Comments

Justification

Unlike Firefox for desktop, the native Firefox Mobile for Android devices do not have any advanced cookie management options, including a setting to delete all cookies when the browser is closed (ie, turn all cookies in session cookies), which improves user privacy by preventing sites and web trackers from persisting data across browsing sessions. This problem is exacerbated by the lack of a setting to reject third-party cookies — there is an option to disable all cookies, but using it also prevents any benign cookie usage (eg. login to sites). There is a feature request open to add these options. This extension solves this problem for now.

New features and development

This add-on was born to solve a very specific problem and no new features are planned for the short term. A possible enhancement is to allow white-listing of cookie that may persist across sessions but, since I do not use Firefox Mobile for extended website logins, I am not sure if it is worth the development effort, but any developer interested in such feature is welcome to write it.